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Search results for planetesimals

Space Exploration Oct 24, 2022

Analysis of gases recovered from asteroid Ryugu by Hayabusa2 spacecraft

Three international teams of researchers studying samples of gases recovered by the Hayabusa2 spacecraft from the near-Earth asteroid Ryugu have published their results. The first studied the asteroid's volatile sources and ...

Planetary Sciences Oct 12, 2022

Martian rock winds back the clock

Almost 10 million years ago, a meteorite crashed into Earth. Hidden inside were 23 microscopic grains which tell the story of how Mars evolved.

Earth Sciences Sep 1, 2022

Estimating uranium and thorium abundance with geoneutrinos

A planet's interior heat comes from two principal sources: leftover energy amassed from collisions between planetesimals during the accretion of the planet and the subsequent decay of radioactive elements embedded within ...

Astronomy Aug 1, 2022

Stellar flybys leave a permanent mark on newly forming planetary systems

What do UX Tauri, RW Aurigae, AS 205, Z CMajoris, and FU Orionis have in common? They're young stellar systems with disks where planets could form. It appears those disks were disturbed by stellar flybys or other close encounters ...

Astronomy Jul 11, 2022

When did the sun blow away the solar nebula?

The story of our solar system's origin is pretty well known. It goes like this: the sun began as a protostar in its "solar nebula" over 4.5 billion years ago. Over the course of several million years, the planets emerged ...

Astronomy Jul 8, 2022

Prospecting for interstellar oil

We have developed a new method to look for carbon compounds in space, akin to prospecting for oil on Earth. Our method is published in Monthly Notices of the Royal Astronomical Society.

Planetary Sciences Jul 8, 2022

New insights into the Earth's formation

Although the Earth has long been studied in detail, some fundamental questions still have to be answered. One of them concerns the formation of our planet, about whose beginnings researchers are still unclear. An international ...

Planetary Sciences Jun 9, 2022

What happened before, during and after solar system formation? Asteroid Ryugu study holds the answers

The Japan Aerospace Exploration Agency's (JAXA) Hayabusa2 mission returned uncontaminated primitive asteroid samples to Earth. A comprehensive analysis of 16 particles from the asteroid Ryugu revealed many insights into the ...

Astronomy Jun 8, 2022

Jupiter turns out to be inhomogeneous; metallicity gives clues about origin

An international team of astronomers, led by Yamila Miguel (SRON/Leiden Observatory), has found that Jupiter's gaseous envelope doesn't have a homogeneous distribution. The inner part has more metals than the outer parts, ...

Astronomy May 24, 2022

The chaotic early phase of the solar system

Before the Earth and other planets formed, the young sun was still surrounded by cosmic gas and dust. Over the millennia, rock fragments of various sizes formed from the dust. Many of these became building blocks for the ...

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